The dangers of left ventricular hypodiastolic function include chest tightness, shortness of breath, and in severe cases, dyspnea. The risk of left ventricular hypodiastolic function is related to the severity of the disease. Mild left ventricular hypodiastolic insufficiency has a relatively small impact on cardiac function, and patients may not have any clinical manifestations. When left ventricular diastolic dysfunction reaches a certain degree, it will lead to the occurrence of cardiac insufficiency, and the patient may have the symptom of chest tightness and shortness of breath, and the symptom will be more obvious after activity, which can be relieved after resting. Severe hypodiastolic left ventricular function can lead to severe heart failure, patients will have difficulty breathing, and some patients may even develop pleural effusion, abdominal effusion and so on. Patients with hypodiastolic left ventricular function should have regular checkups, be treated actively and according to medical advice.